Insider Brief
- Photon Queue has raised an oversubscribed $4 million seed round led by Playground Global to accelerate development and deployment of its room-temperature quantum memory technology for quantum computing and networking systems.
- The company said its quantum memory devices store and synchronize single photons without requiring cryogenics, vacuum systems or quantum transduction, and are designed to work across multiple quantum computing platforms, including photonic, trapped-ion and neutral-atom systems.
- Photon Queue said it has deployed its first commercial systems at Sandia National Laboratories and the University of Maryland, building on early customer traction following its 2024 spinout from the University of Illinois Urbana-Champaign.
PRESS RELEASE — Photon Queue, a quantum technology company building high-efficiency quantum memories for next-generation quantum computing systems, today announced the close of its oversubscribed seed funding round of $4 million, led by Playground Global. The seed round builds on Photon Queue’s early customer traction, including contracts with Sandia National Laboratories and the University of Maryland that validate demand from leading institutions at the forefront of quantum computing and photonic systems research.
The funding will accelerate Photon Queue’s product development, manufacturing capabilities and customer deployments as the company scales to meet demand from quantum computing companies, national laboratories and research institutions.
Quantum computing depends on photons arriving at exactly the right place and time. As systems scale, quantum platforms will need to network many smaller processors together, creating a universal bottleneck: synchronizing single photons across complex quantum systems. Quantum memories solve that problem by storing photons until they are needed.
Photon Queue’s devices store photons directly in free-space optical loops using proprietary high-reflectivity mirror systems and optical switches. Unlike other approaches that require cryogenics, vacuum systems or complex transduction processes, Photon Queue’s devices operate at room temperature using standard power, while delivering ultra-high efficiency and world-leading bandwidth.
“Useful quantum computing will require photons to move through networks with extraordinary precision, efficiency and timing. That is the problem Photon Queue was founded to solve,” said Nathan Arnold, co-founder and CEO of Photon Queue. “In less than two years, we have taken technology from the lab to deployed commercial hardware with leading national lab and university customers. Our work with Sandia and the University of Maryland is a major validation point that quantum memory is becoming essential infrastructure for the next era of computing.”
Photon Queue’s devices are designed to be compatible with virtually any wavelength, making them broadly applicable across photonic, trapped ion, neutral atom and other quantum computing architectures. The company has deployed its first commercial quantum memory device at Sandia National Laboratories and the University of Maryland.
“Quantum computing is hitting a scale problem that better qubits alone cannot solve. The industry needs new infrastructure to move, store and synchronize photons with far greater efficiency,” said Marissa Ramirez de Chanlatte, Investor at Playground Global. “Photon Queue has built an elegant solution, turning breakthrough quantum optics into commercial hardware, with early customer traction. We believe they are a foundational company that will define the quantum memory category.”
“Quantum memories are a critical enabling technology for distributed quantum systems, and performance, efficiency and ease of integration are essential,” said Saikat Guha, Clark Distinguished Chair Professor of Electrical and Computer Engineering at the University of Maryland, College Park and director of the NSF Center for Quantum Networks. “Photon Queue’s room-temperature, free-space approach is compelling because it stores photons directly without the complexity of cryogenics, vacuum systems or transduction. We look forward to working with the Photon Queue team as they continue developing practical quantum memory hardware for our research in quantum networking, sensing, and communication”
Founded in 2024 as a spinout from the University of Illinois Urbana-Champaign, Photon Queue is led by co-founders Nathan Arnold, CEO and Kelsey Ortiz, CTO. The founding team brings deep expertise in quantum optics, photonic systems and hardware commercialization.
Photon Queue is a graduate of the Duality Quantum Accelerator, a corporate partner of the Chicago Quantum Exchange and the winner of the Q2B Startup Pitch Competition. CEO Nathan Arnold is also a fellow at Chain Reaction Innovations at Argonne National Laboratory, a U.S. Department of Energy entrepreneurship program.
Photon Queue also recently announced $500,000 in funding from the New Mexico Economic Development Department and Roadrunner Venture Studios to support its expansion in New Mexico and deepen its work with the region’s national laboratory and quantum technology ecosystem.
